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Distributed MAC protocol for networks with multipacket reception capability and spatially distributed nodes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Celik, Guner Dincer |
| Copyright Year | 2007 |
| Abstract | The physical layer of future wireless networks will be based on novel radio technologies such as Ultra-Wideband (UWB) and Multiple-Input Multiple-Output (MIMO). One of the important capabilities of such technologies is the ability to capture a few packets simultaneously. This capability has the potential to improve the performance of the MAC layer. However, we show that in networks with spatially distributed nodes, reusing MAC protocols originally designed for narrow-band systems (e.g., CSMA/CA) is inefficient. It is well known that when networks with spatially distributed nodes operate with such MAC protocols, the channel may be captured by nodes that are near the destination. We show that when the physical layer enables multi-packet reception, the negative implications of reusing the legacy protocols include not only such unfairness but also a significant throughput reduction. We present a number of simple alternative backoff mechanisms that attempt to overcome the throughput reduction phenomenon. We evaluate the performance of these mechanisms via exact analysis, approximations, and simulation, thereby demonstrating that they usually outperform the legacy backoff mechanisms. We then discuss the implications of the results on developing realistic MAC protocols for networks with a multi-packet reception capability and in particular for UWB networks. Thesis Supervisor: Eytan Modiano Title: Associate Professor Acknowledgments I am profoundly thankful to my advisor, Prof. Eytan Modiano, and Post Doc. Assoc. Gil Zussman for their support in this work, for their guidance that helped me continue my research in the right direction and for their friendly mood that makes it enjoyable to work with them. I also would like to thank my family for their endless moral support throughout my career. Finally, this work was supported in part by ONR under grant N000140610064, and by a grant from Draper Laboratory. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://dspace.mit.edu/bitstream/handle/1721.1/40523/191871881-MIT.pdf?sequence=2 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
